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2 Sheets-Sheet IQ S. H. RANSM.

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No. 91,563,v Patented Junef22, Muga/.WA

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Letters .Patent No. 91,563, dated .Tune 22, 1869.

cooKING-s'rove.

The Schedule referred to' lncthese Letters @Patent and ymaking part of the same To all whom, 'it may concern.:

Be it known that I, S. H; RANsoM, of the city and .county of Albany, and State of New York, have in- -through the centre of my improved` stove, in the vertical plane indicated by line in iig. 2. Figure 2, sheet 1,'is a top view of the stove* Figure 3, sheet 2, is a section taken v transv rsely through the upper portion of thegstove, in the vertical plane indicated by line z z, in fig. 1, looking`rearward.

Figure 4,Y sheet 2, is a transverse section taken through the stove in the vertical plane indicatedby line y y, in fig I, looking rearward. Y

Figure 5, sheet 2, is a perspective view of a removable rear flue-extension or pipe-connection of the stove.

-Similarletters of reference indicatecorresponding parts in the several figures. v This invention relatesto improvements on that class vof cooking-stoves which have chambers extended in rear of their hack plates, and which are denominated extension-top stoves. h

The nature ofA my invention consists- First, in so arranging the fines and damper of an extension-top stove, that all of that portion ofthe chamber formed by the extensicnof the upper portion of the stove shall be free to receive the heated products of combustion before they enter the ues below the top plate of the oven, whether the damper be closed against the direct draught or not, as will be hereinafter explained.

Secondly, iii a removable cast-metal elbow or tineextension, which is applicable to an extension-top stove, for receiving the stove-pipe, and which can be readily removed when the stove is packed for transportation, as will be hereinafter explained.

To enable others skilled in the art to understand my invention, I will describe its Yconstruction and operation. Y

In the accompanying drawings- A represents the fire-chamber of' the stove;

B, the oven; and Y a a, horizontal sheet-due, which extends from the fire-chamber A, overl the oven, over the fines a a' b, to the rear end of the rear extension E, thus forming an unobstructed flue-space beneath the entire bottom surface of the top plate D, of the stove.

'lhe top plate D is constructed with two pot-holes, arranged over the tire-chamber A, two holes over the top oven-plate c, and two arranged over the vertical flues aa b, and extension E, as' shown inig. 2.

t Between the rear extension E, and the rear Wall of the oven B, are three vertical lines, which are formed by this wall on one side, thel rear wall j of the body of the stove on the other side, and two vertical division-plates G'Ofwhich latter extend beneath the oven nearly to the front wall ofrthestove.

The upper ends of these plates O C terminate on a'. level, ornearly vso,with the top-plate of the oven, at a point between the horizontal sheet-fine a, and the escape-flue b, and they form a central ue for the return-draught, and also two side lues aa, for conduct-V ing the products down behind 'the oven, and beneath its bottom plate, to the front opening of the returnflue b.

-At or near the upper terminus of the vertical por- *tiou of the return-flue b, and at a point which is above the escape-.orifice of lue 1), a damper, h, is arranged, as shown in figs. l, 2, and 4.

-By shutting this damper, as shown in fig. l, the p roducts of combustion, after circulating in the entire space a, willdescend through lines a a', pass forward beneath theoven, and thence enter return-flue b, and l escape into b', lbeneath the damper.

When this damper his open, the products will also circulate in the entire space a, as before, but descend directly into b, and passoff through b'.

Thus it will be seen that the chamber in the extension E is exposed to the action of the highly-heated products passing from the fire-chamber before the products descend into -the tlues a a l), whether the direct draught be closed or'open.

The escape-orifice is made through the back-platej, immediately beneath the rear extended portion E, and from this orifice the products aie carried through an elbow extension-F, on their way to the smoke-pipef .This elbow is removable, and when it is applied te the stove it fits snugly beneath the extension E, and

is held securely in place by a hooked lug, f, and one or more screws' g, as shown in tig. 1. Instead of applying the screw-fastening g, through the bottom yof the extension E, as shown in iig. l, it may be passed through that portion of the rear edge of top plate D which extends over the upper surface ot' the elbow F.

This elbow is constructed with a pipe-collar, f, upon its upper end, which end is nearly in the horizontal plane of the stove-top D, and when it is desired to pack the stove for transportation, the elbow is removed.

The top plate vc of the oven B, is corrugated, so as to form valleys or depressions, running longitudinally between the two rows of pot-holes through plate D, and to leave in the centre of this plate an elevation or ridge, as shown in tig. 3.

. By thus constructing plate c, I not only protect it from cracking by expansion and contraction, but I ,precise arrangement shown, as the invention is also applicable to stoves having broad sheet-fines, two

dues, or in fact any of the known dues. `It is also equally applicable to stoves with oven eulargedor extended, or that the rear back-plate of the flue `inlay be about in verticaLline with hack of top plate.`

- What I claim as new, and desire -to secure by Letters Patent, is

1. Such an arrangement, in anextension-tcp cookstove, as will allow all that portion of the chamberformed by the rear extension of the `upperpart ofthe stove, to receive the heated products before they enter the dues below the top plate of the oven, whether the direct-draught'damper be closed or open, substantially as described. l

2; In combination with the free space a, extending horizontally from the tire-chamber into the chamber formed by a'rear extension, E, a damper, h, or its equivalent, arranged below said space a, but above the escape-passage b', substantially as described.

3. Elue-plates C C, Jlterminating at their upper ends on a level, or nearly so, with the top plate of oven B, in combination with ues a' a' and b, and a damper, arranged substantially asdescribed.

4. The portable elbow-extension F, arranged below the extension-chamber E, aud secured by a hook, f, and a screw-fastening, g, substantially as described.

v-5. The relative arrangement of a, E, F, It, and O, substantially as described.

S. H. RANSOM. Witnesses:

B. BURTON, JAMES A. GREIG. 

